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(No Model.)

H. C. RUMPP. APPARATUS FOR MANUFACTURING RAILROAD SPIKES.

Patented May 24,1898.

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HEINRICH Cl'lRlSTlANiRUMPF, OF DAHLHAUSEN, GERMANY.

APPARATUS FOR MANUFACTURING RAlLROAD SPlKES.

SPECIFICATION forming part of Letters Patent No. 604,591, dated May 24,1898.

Application filed October 1, 1896. Serial No. 607,541. (No model.)Patented in Hungary August 12,1896,No. 7,132; in England August14,1896,No.18,00 1; in France August 14,1396,N0.258,893; in BelgiumAugust 14,1896,No;123,031,

and in Austria September 18, 1896, No. Ali/3,652.

To ctZZ whom it may concern:

Be it known that I, HEINRICH CHRISTIAN RUMPF, manufacturer,ofDahlhausen-on-the- Ruhr, in the German Empire, have invented new anduseful Improvements in Apparatus for Manufacturing Rail-Spikes andSimilar Headed Nails, (for which I have obtained Letters Patent in GreatBritain, No. 18,004, dated August 14, 1896; in Hungary, No. 7,132, datedAugust 12, 1896; in France, No. 258,893, dated August 14, 1896; inBelgium, No. 123,031, dated August 14, 1896, and in Austria, No.IB/3,652, dated September 18, 1896,) of which the following is aspecification, reference being had therein to the accompanying draw-1ngs.

This invention relates to the manufacture of spikes for rails and chairsand other similar headed nails of all sorts; and it consists inimprovements in apparatus for said manufacture.

The object of the invention consists in passing two bars of iron orsteel having cross-sectionslike the longitudinal section of the nails tobe made and punching or shearing from these bars two separate sets ofnails or spikes and at the same time serrating the sides of said nailsor spikes all at a single operation of the machine.

The drawings appended hereunto serve to illustrate the invention andshow one form of apparatus adapted to carry it out.

Figure 1 shows a section of the profiled bar from which the spikes arepunched. Figs. 1 and 2 show a spike made from this bar in side and endview. Figs. 3, 4E, and 5 represent a machine embodying my inventionrespectively in longitudinal and cross section on line so to, Fig. 3,and in plan. Fig. 6 is a per spective view of the finished spike.

In carrying out this invention two bars of iron or steel G are rolledhaving a profile as shown by Fig. 1'that is to say, corresponding withthe longitudinal section of the spike, Fig. 1, but without the sharpedge of the finished spike O at their points d and without theserrations c, which are only formed by the punching out of the spike.For producing the sharp edge or pointing the bars are passed under arapidly-striking hammer and the edges drawn out while cold, whereby theadvantage is gained that each separate spike need not be pointed afterbeing cut off. The bars are then placed upon a die or matrix consistingof two sets of plates or cheeks a corresponding in width and length tothe spikes to be produced and profiled corre spondingly to the back ofthe bar 0, with a distance between the side checks at of the die equalto the breadth of the spike to be formed, these sets being separated bylongitudinal partitions C6. The two sets of punches b, which move up anddown in the interstice between the cheeks a, are likewise shapedcorresponding to the front of the bar 0 and formed with recesses c formaking the serrations or teeth 8 on the spike C, Fig. 1 While the upperportions b of the spaces between said punches b are likewise formed withrecesses c for the purpose of serrating the spikes left on top of thecheeks a during the cutting operation, as shown in Fig. 7. When the bars0 have been placed upon the die and the punch is pushed down understrong pressure into the interstice between the checks of the die,spikes are punched out of the bars 0. By the great pressure under whichthe punch separates the material serrations or teeth 0 are pressed outinto the recesses c of the punch. It is evident that by such means aconsiderable saving of labor, and consequently of expense, is effectedcompared with any other method of manufacture, as in this case the spikeis finished completely in three stages or operations-viz., the rollingof the profiled bar 0, the hammering out of the edge forming the pointscl, and the punching of the spikes G. V i

If the spikes C are to have projections or cars at the side for drawingthem out of the sleepers, each bar 0, as shown by Fig. 1, is

rolled of such a section that after punching cheeks or plates at ofwhich are each arranged for making two spikes, as shown by Fig. 3. Thedie is formed with a number of cheeks or plates a, and the punch with anumber of projections 5, arranged opposite the interstices between thechecks a. When the profiled bar 0 has been placed upon the die, thepunch is brought down by means of suitable mechanism with great forceand punches out a series of spikes. The cheeks or plates a are made ofthe same thickness as the breadth of the spikes, so that there will beno waste, the material remaining on the top of the die being likewise aseries of similar spikes to those punched out. The mechanism foractuating the punch may be arranged in any suitable ordinary way as usedfor heavy punching-machines or forging-presses.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is

In a machine for severing a blank into nails or spikes, the combinationwith a fixed and a movable die having alternate projections anddepressions adapted to register with each other, the surfaces of theprojections and depressions of one of said dies being serrated to imparttheir contour to the nails or spikes while being severed, substantiallyas set forth.

HEINRICH CHRISTIAN RUMPF.

W'itnesses:

F. E. CALLMETER, MASE FoRsTER.

